/*
 * FreeRTOS V202212.00
 * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * https://www.FreeRTOS.org
 * https://github.com/FreeRTOS
 *
 */

/******************************************************************************
 * See http://www.freertos.org/EFM32-Giant-Gecko-Pearl-Gecko-tickless-RTOS-demo.html
 *
 * This project provides two demo applications.  A simple blinky style project
 * that demonstrates low power tickless functionality, and a more comprehensive
 * test and demo application.  The configCREATE_LOW_POWER_DEMO setting, which is
 * defined in FreeRTOSConfig.h, is used to select between the two, and to select
 * the clock used when demonstrating tickless functionality.
 *
 * The simply blinky low power demo is implemented and described in
 * main_low_power.c.  The more comprehensive test and demo application is
 * implemented and described in main_full.c.
 *
 * This file implements the code that is not demo specific, including the
 * hardware setup and standard FreeRTOS hook functions.
 *
 * ENSURE TO READ THE DOCUMENTATION PAGE FOR THIS PORT AND DEMO APPLICATION ON
 * THE http://www.FreeRTOS.org WEB SITE FOR FULL INFORMATION ON USING THIS DEMO
 * APPLICATION, AND ITS ASSOCIATE FreeRTOS ARCHITECTURE PORT!
 *
 */

/* FreeRTOS includes. */
#include "FreeRTOS.h"
#include "task.h"

/* SiLabs includes. */
#include "em_emu.h"
#include "bsp.h"
#include "bsp_trace.h"
#include "sleep.h"

/*-----------------------------------------------------------*/

/*
 * Configure the hardware as necessary to run this demo.
 */
static void prvSetupHardware( void );

/*
 * main_low_power() is used when configCREATE_LOW_POWER_DEMO is set to 1.
 * main_full() is used when configCREATE_LOW_POWER_DEMO is set to 0.
 */
#if ( configCREATE_LOW_POWER_DEMO != 0 )
    extern void main_low_power( void );
#else
    extern void main_full( void );
#endif /* #if configCREATE_LOW_POWER_DEMO == 1 */

/* Prototypes for the standard FreeRTOS callback/hook functions implemented
 * within this file. */
void vApplicationMallocFailedHook( void );
void vApplicationIdleHook( void );
void vApplicationStackOverflowHook( TaskHandle_t pxTask,
                                    char * pcTaskName );
void vApplicationTickHook( void );

/*-----------------------------------------------------------*/

int main( void )
{
    /*
     * See the following link for instructions:
     * https://www.FreeRTOS.org/EFM32-Giant-Gecko-Pearl-Gecko-tickless-RTOS-demo.html
     */

    /* Configure the hardware ready to run the demo. */
    prvSetupHardware();

    /* The mainCREATE_LOW_POWER_DEMO setting is described at the top
     * of this file. */
    #if ( configCREATE_LOW_POWER_DEMO != 0 )
    {
        main_low_power();
    }
    #else
    {
        main_full();
    }
    #endif

    /* Should not get here. */
    return 0;
}
/*-----------------------------------------------------------*/

static void prvSetupHardware( void )
{
    EMU_DCDCInit_TypeDef xDCDInit = EMU_DCDCINIT_STK_DEFAULT;
    CMU_HFXOInit_TypeDef xHFXOInit = CMU_HFXOINIT_STK_DEFAULT;

    /* Chip errata */
    CHIP_Init();

    /* Init DCDC regulator and HFXO with kit specific parameters */
    EMU_DCDCInit( &xDCDInit );
    CMU_HFXOInit( &xHFXOInit );

    /* Switch HFCLK to HFXO and disable HFRCO */
    CMU_ClockSelectSet( cmuClock_HF, cmuSelect_HFXO );
    CMU_OscillatorEnable( cmuOsc_HFRCO, false, false );

    /* Initialize LED driver. */
    BSP_LedsInit();
    BSP_LedSet( 0 );
    BSP_LedClear( 1 );
}
/*-----------------------------------------------------------*/

void vApplicationMallocFailedHook( void )
{
    /* Called if a call to pvPortMalloc() fails because there is insufficient
     * free memory available in the FreeRTOS heap.  pvPortMalloc() is called
     * internally by FreeRTOS API functions that create tasks, queues, software
     * timers, and semaphores.  The size of the FreeRTOS heap is set by the
     * configTOTAL_HEAP_SIZE configuration constant in FreeRTOSConfig.h. */

    /* Force an assert. */
    configASSERT( ( volatile void * ) NULL );
}
/*-----------------------------------------------------------*/

void vApplicationStackOverflowHook( TaskHandle_t pxTask,
                                    char * pcTaskName )
{
    ( void ) pcTaskName;
    ( void ) pxTask;

    /* Run time stack overflow checking is performed if
     * configCHECK_FOR_STACK_OVERFLOW is defined to 1 or 2.  This hook
     * function is called if a stack overflow is detected. */

    /* Force an assert. */
    configASSERT( ( volatile void * ) NULL );
}
/*-----------------------------------------------------------*/

void vApplicationIdleHook( void )
{
    volatile size_t xFreeHeapSpace;

    /* This is just a trivial example of an idle hook.  It is called on each
     * cycle of the idle task.  It must *NOT* attempt to block.  In this case the
     * idle task just queries the amount of FreeRTOS heap that remains.  See the
     * memory management section on the http://www.FreeRTOS.org web site for memory
     * management options.  If there is a lot of heap memory free then the
     * configTOTAL_HEAP_SIZE value in FreeRTOSConfig.h can be reduced to free up
     * RAM. */
    xFreeHeapSpace = xPortGetFreeHeapSize();

    /* Remove compiler warning about xFreeHeapSpace being set but never used. */
    ( void ) xFreeHeapSpace;
}
/*-----------------------------------------------------------*/

void vApplicationTickHook( void )
{
    /* The full demo includes tests that run from the tick hook. */
    #if ( configCREATE_LOW_POWER_DEMO == 0 )
    {
        extern void vFullDemoTickHook( void );

        /* Some of the tests and demo tasks executed by the full demo include
         * interaction from an interrupt - for which the tick interrupt is used
         * via the tick hook function. */
        vFullDemoTickHook();
    }
    #endif
}
/*-----------------------------------------------------------*/

/* configUSE_STATIC_ALLOCATION is set to 1, so the application must provide an
 * implementation of vApplicationGetIdleTaskMemory() to provide the memory that is
 * used by the Idle task. */
void vApplicationGetIdleTaskMemory( StaticTask_t ** ppxIdleTaskTCBBuffer,
                                    StackType_t ** ppxIdleTaskStackBuffer,
                                    uint32_t * pulIdleTaskStackSize )
{
/* If the buffers to be provided to the Idle task are declared inside this
 * function then they must be declared static - otherwise they will be allocated on
 * the stack and so not exists after this function exits. */
    static StaticTask_t xIdleTaskTCB;
    static StackType_t uxIdleTaskStack[ configMINIMAL_STACK_SIZE ];

    /* Pass out a pointer to the StaticTask_t structure in which the Idle task's
     * state will be stored. */
    *ppxIdleTaskTCBBuffer = &xIdleTaskTCB;

    /* Pass out the array that will be used as the Idle task's stack. */
    *ppxIdleTaskStackBuffer = uxIdleTaskStack;

    /* Pass out the size of the array pointed to by *ppxIdleTaskStackBuffer.
     * Note that, as the array is necessarily of type StackType_t,
     * configMINIMAL_STACK_SIZE is specified in words, not bytes. */
    *pulIdleTaskStackSize = configMINIMAL_STACK_SIZE;
}
/*-----------------------------------------------------------*/

/* configUSE_STATIC_ALLOCATION and configUSE_TIMERS are both set to 1, so the
 * application must provide an implementation of vApplicationGetTimerTaskMemory()
 * to provide the memory that is used by the Timer service task. */
void vApplicationGetTimerTaskMemory( StaticTask_t ** ppxTimerTaskTCBBuffer,
                                     StackType_t ** ppxTimerTaskStackBuffer,
                                     uint32_t * pulTimerTaskStackSize )
{
/* If the buffers to be provided to the Timer task are declared inside this
 * function then they must be declared static - otherwise they will be allocated on
 * the stack and so not exists after this function exits. */
    static StaticTask_t xTimerTaskTCB;
    static StackType_t uxTimerTaskStack[ configTIMER_TASK_STACK_DEPTH ];

    /* Pass out a pointer to the StaticTask_t structure in which the Timer
     * task's state will be stored. */
    *ppxTimerTaskTCBBuffer = &xTimerTaskTCB;

    /* Pass out the array that will be used as the Timer task's stack. */
    *ppxTimerTaskStackBuffer = uxTimerTaskStack;

    /* Pass out the size of the array pointed to by *ppxTimerTaskStackBuffer.
     * Note that, as the array is necessarily of type StackType_t,
     * configMINIMAL_STACK_SIZE is specified in words, not bytes. */
    *pulTimerTaskStackSize = configTIMER_TASK_STACK_DEPTH;
}
